82878033709 has 8 divisors (see below), whose sum is σ = 85588252568. Its totient is φ = 80192566080.

The previous prime is 82878033683. The next prime is 82878033731. The reversal of 82878033709 is 90733087828.

It can be written as a sum of positive squares in 4 ways, for example, as 997928100 + 81880105609 = 31590^2 + 286147^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 82878033709 - 2¹⁷ = 82877902637 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 82878033709.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82878033209) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6181002 + ... + 6194395.

It is an arithmetic number, because the mean of its divisors is an integer number (10698531571).

Almost surely, 2^82878033709 is an apocalyptic number.

It is an amenable number.

82878033709 is a deficient number, since it is larger than the sum of its proper divisors (2710218859).

82878033709 is a wasteful number, since it uses less digits than its factorization.

82878033709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12375615.

The product of its (nonzero) digits is 4064256, while the sum is 55.

The spelling of 82878033709 in words is "eighty-two billion, eight hundred seventy-eight million, thirty-three thousand, seven hundred nine".